Delphi ActiveX

Example: Http.QuickGet method

Demonstrates the QuickGet method. Delphi ActiveX

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Integer;
http: TChilkatHttp;
zipBytes: Array of Byte;
zip: TChilkatZip;
entry: TChilkatZipEntry;
lineEndingBehavior: Integer;
xmlStr: WideString;
sb: TChilkatStringBuilder;

begin
success := 0;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

http := TChilkatHttp.Create(Self);
http.KeepResponseBody := 1;

// This URL is valid and can be tested...

zipBytes := http.QuickGet('https://chilkatdownload.com/example_data/hamlet.zip');
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

if (http.LastStatus <> 200) then
  begin
    Memo1.Lines.Add('Response status code: ' + IntToStr(http.LastStatus));
    Memo1.Lines.Add(http.LastResponseBody);
    Exit;
  end;

zip := TChilkatZip.Create(Self);

// Open the zip from the bytes contained in bd.
success := zip.OpenFromMemory(zipBytes);
if (success = 0) then
  begin
    Memo1.Lines.Add(zip.LastErrorText);
    Exit;
  end;

// Get the entry for the file we want..
entry := TChilkatZipEntry.Create(Self);
success := zip.EntryOf('hamlet.xml',entry.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(zip.LastErrorText);
    Exit;
  end;

// Convert all line endings to CRLF (if needed)
lineEndingBehavior := 2;
xmlStr := entry.UnzipToString(lineEndingBehavior,'utf-8');
if (entry.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(entry.LastErrorText);
    Exit;
  end;

// The XML in this case is about 274K, so let's just examine the last 20 lines...
sb := TChilkatStringBuilder.Create(Self);
sb.Append(xmlStr);

Memo1.Lines.Add(sb.LastNLines(20,1));
end;